If I have a C# class MyClass
as below:
using System.Diagnostics;
namespace ConsoleApplication1
{
class MyClass
{
public int pPublic {get;set;}
private int pPrivate {get;set;}
internal int pInternal {get;set;}
}
class Program
{
static void Main(string[] args)
{
Debug.Assert(typeof(MyClass).GetProperties(
System.Reflection.BindingFlags.Public |
System.Reflection.BindingFlags.Instance).Length == 1);
Debug.Assert(typeof(MyClass).GetProperties(
System.Reflection.BindingFlags.NonPublic |
System.Reflection.BindingFlags.Instance).Length == 2);
// internal?
// protected?
// protected internal?
}
}
}
The code above compiles are runs without any assertion failures. NonPublic returns the Internal and Private properties. There does not appear to be flags for the other accessibility types on BindingFlags .
How do I get a list/array of only the properties that are internal? On a related note, but not necessary for my application, what about protected, or protected internal?
When you get the property infos with BindingFlags.NonPublic
, you find the getter or setter by using GetGetMethod(true)
and GetSetMethod(true)
, respectively. You can then check the following properties (of the method info) to get the exact access level:
propertyInfo.GetGetMethod(true).IsPrivate
means private propertyInfo.GetGetMethod(true).IsFamily
means protected propertyInfo.GetGetMethod(true).IsAssembly
means internal propertyInfo.GetGetMethod(true).IsFamilyOrAssembly
means protected internal propertyInfo.GetGetMethod(true).IsFamilyAndAssembly
means private protected and similarly for GetSetMethod(true)
of course.
Remember that it is legal to have one of the accessors (getter or setter) more restricted than the other one. If there is just one accessor, its accessibility is the accessibility of the entire property. If both accessors are there, the most accessible one gives you the accessibility of the whole property.
Use propertyInfo.CanRead
to see if it's OK to call propertyInfo.GetGetMethod
, and use propertyInfo.CanWrite
to see if it's OK to call propertyInfo.GetSetMethod
. The GetGetMethod
and GetSetMethod
methods return null
if the accessor does not exist (or if it is non-public and you asked for a public one).
See this article on MSDN.
Relevant quote:
The C# keywords protected and internal have no meaning in IL and are not used in the reflection APIs. The corresponding terms in IL are Family and Assembly. To identify an internal method using reflection, use the IsAssembly property. To identify a protected internal method, use the IsFamilyOrAssembly.
带有System.Reflection.BindingFlags.NonPublic
标志的GetProperties
返回所有这些: private
、 internal
、 protected
和protected internal
。
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